Classifications

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  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
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  • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
  • A61K31/44—Non condensed pyridines; Hydrogenated derivatives thereof
  • A61K31/445—Non condensed piperidines, e.g. piperocaine
  • A61K31/4523—Non condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems
  • A61K31/453—Non condensed piperidines, e.g. piperocaine containing further heterocyclic ring systems containing a six-membered ring with oxygen as a ring hetero atom
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  • A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
  • A61K31/407—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil condensed with other heterocyclic ring systems, e.g. ketorolac, physostigmine
• • A—HUMAN NECESSITIES
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  • A61K31/435—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom
  • A61K31/4353—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems
  • A61K31/436—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with one nitrogen as the only ring hetero atom ortho- or peri-condensed with heterocyclic ring systems the heterocyclic ring system containing a six-membered ring having oxygen as a ring hetero atom, e.g. rapamycin
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  • A61K9/143—Intimate drug-carrier mixtures characterised by the carrier, e.g. ordered mixtures, adsorbates, solid solutions, eutectica, co-dried, co-solubilised, co-kneaded, co-milled, co-ground products, co-precipitates, co-evaporates, co-extrudates, co-melts; Drug nanoparticles with adsorbed surface modifiers with inorganic compounds
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  • A61K9/141—Intimate drug-carrier mixtures characterised by the carrier, e.g. ordered mixtures, adsorbates, solid solutions, eutectica, co-dried, co-solubilised, co-kneaded, co-milled, co-ground products, co-precipitates, co-evaporates, co-extrudates, co-melts; Drug nanoparticles with adsorbed surface modifiers
  • A61K9/145—Intimate drug-carrier mixtures characterised by the carrier, e.g. ordered mixtures, adsorbates, solid solutions, eutectica, co-dried, co-solubilised, co-kneaded, co-milled, co-ground products, co-precipitates, co-evaporates, co-extrudates, co-melts; Drug nanoparticles with adsorbed surface modifiers with organic compounds
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  • A61K9/141—Intimate drug-carrier mixtures characterised by the carrier, e.g. ordered mixtures, adsorbates, solid solutions, eutectica, co-dried, co-solubilised, co-kneaded, co-milled, co-ground products, co-precipitates, co-evaporates, co-extrudates, co-melts; Drug nanoparticles with adsorbed surface modifiers
  • A61K9/146—Intimate drug-carrier mixtures characterised by the carrier, e.g. ordered mixtures, adsorbates, solid solutions, eutectica, co-dried, co-solubilised, co-kneaded, co-milled, co-ground products, co-precipitates, co-evaporates, co-extrudates, co-melts; Drug nanoparticles with adsorbed surface modifiers with organic macromolecular compounds
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  • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
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  • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
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  • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
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  • A61K9/1629—Organic macromolecular compounds
  • A61K9/1635—Organic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyvinyl pyrrolidone, poly(meth)acrylates
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  • A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
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  • A61P37/06—Immunosuppressants, e.g. drugs for graft rejection

Definitions

• the present invention relates to a formulation containing a macrolide compound and being endowed with an ability of an extremely excellent sustained-release, for use in a medical field.
• An oral formulation of one of macrolide compounds namely tacrolimus with an useful immunosuppressive activity, has been prepared as a solid dispersion compositions, which possesses a rapid-release characterization by using polymers such as hydroxypropylmethyl cellulose and disintegrator (see for example EP 0 240 773). Owing to the presence of disintegrator therein, it is a rapid-release formulation. It has been appraised highly in clinical field owing to its high absorbability. In clinical practice, alternatively, the emergence of an oral tacrolimus formulation with a sufficient long action and excellent oral absorbability has been expected.
• the present invention relates to a sustained-release formulation of a macrolide compound, wherein the dissolution of the macrolide compound is under sustained release.
• the T63.2% value as determined by the dissolution test in accordance with this invention can be estimated from the release curve constructed by plotting test data on graph paper.
• the release profile of a drug can be generally analyzed by fitting dissolution test data to a release model and such a method can also be used in the computation of said T63.2% value.
• the model for fitting which can be used includes the first-order or linear model, zero-order model, cube-root model, etc. as described in Yamaoka, K. & Yagahara, Y.: Introduction to Pharmacokinetics with a Microcomputer, Nankodo, p.138 but as a model by which all kinds of release patterns can be expressed with the highest validity, there is known Weibull function, which is described in the above book and L. J. Leeson & J. T. Carstensen (ed.): Release of Pharmaceutical Products (American Pharmaceutical Society) (Chizin Shokan), p.192-195.
• Dissolution rate (%) D max x ⁇ 1-exp[-((T-Ti) n )/m] ⁇
• D max represents the maximum dissolution rate at infinite time
• m is a scale parameter representing the dissolution velocity
• n is a shape parameter representing the shape of the dissolution curve
• Ti is a position parameter representing the lag time till start of dissolution
• dissolution characteristic of a pharmaceutical product can be expressed by using those parameters in combination.
• the nonlinear least square method described in Yamaoka, K. & Yagahara, Y.: Introduction to Pharmacokinetics with a Microcomputer, Nankodo, p.40, mentioned above, is used. More particularly, the parameters are determined at the point of time where the sum of the squares of differences between the values calculated by the above equation and the measured values at each point of time is minimal and the dissolution curve calculated by means of the above equation using those parameters is the curve which dose most faithfully represent the measured values.
• D max (maximum dissolution rate) is the maximum dissolution rate at infinity of time as mentioned above and generally the value of D max is preferably as close to 100 (%) as possible.
• m (scale parameter) is a parameter representing the dissolution velocity of a pharmaceutical product, and the smaller the value of m is, the higher is the dissolution velocity and similarly the larger the value of m is, the lower is the dissolution velocity.
• n shape parameter
• dissolution rate (%) D max x ⁇ 1-exp[-(T-Ti)/m] ⁇ , and since this is equivalent to first-order kinetics, the dissolution curve is linear.
• dissolution curve plateaus off.
• a sigmoid dissolution curve prevails.
• Ti is a parameter representing the lag time till start of dissolution.
• the sustained-release formulation comprising a macrolide compound according to this invention can also be characterized by means of said Weibull function.
• the objective sustained-release formulation can be implemented by setting D max (maximum dissolution rate) at 80% or more, preferably 90% or more, more preferably 95% or more, m (scale parameter) at 0.7 ⁇ 20, preferably 1 ⁇ 12, more preferably 1.5 ⁇ 8, n (shape parameter) at 0.2 ⁇ 5, preferably 0.3 ⁇ 3, more preferably 0.5 ⁇ 1.5, and Ti (position parameter) at 0 ⁇ 12, preferably 0 ⁇ 8, and more preferably 0 ⁇ 4.
• the release characteristic of the sustained-release formulation of this invention can be evaluated by the Dissolution Test, Method 2 (Paddle method, 50 rpm) of JP XIII using a test solution which is 0.005% aqueous solution of hydroxypropyl cellulose adjusted at pH 4.5.
• the time(T63.2%) in which 63.2% of the maximum amount of the macrolide compound to be dissolved is released from the formulation is 0.7 ⁇ 15 hours.
• any sustained-release formulations, T63.2% of which is 0.7 ⁇ 15 hours and which are quite useful in clinical practice, have never been produced.
• the present invention completed it for the first time. If the T63.2% value is shorter than 0.7 hour, the efficacy of the macrolide compound following oral administration will not be sufficiently sustained.
• T63.2% When the formulation has a T63.2% value of more than 15 hours, the release of the active ingredient will be so retarded that the active ingredient will be eliminated from the body before the effective blood concentration is reached, thus being unsuited as the formulation of this invention.
• T63.2% is 1.0 ⁇ 12 hours, a more favorable sustained-release can be achieved. More preferably, T63.2% is 1.3 ⁇ 8.2 hours, and the most preferred is a sustained-release formulation with a T63.2% value of 2 ⁇ 5 hours.
• macrolide compound for use in accordance with the invention is the generic name of compounds with 12 members or more, which belong to large-ring lactones. Abundant macrolide compounds generated by microorganisms of the genus Streptomyces, such as rapamycin, tacrolimus (FK506), and ascomycin, and the analogs and derivatives thereof are included in the term macrolide compound.
• the tricyclic compound of the following formula (I) can be exemplified.
• R 24 may be cyclo(C 5-7 )alkyl group, and the following ones can be exemplified.
• lower means, unless otherwise indicated, a group having 1 to 6 carbon atoms.
• alkyl groups and an alkyl moiety of the "alkoxy group” include a straight or branched chain aliphatic hydrocarbon residue, for example, a lower alkyl group such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, pentyl, neopentyl and hexyl.
• alkenyl groups include a straight or branched chain aliphatic hydrocarbon residue having one double-bond, for example, a lower alkenyl group such as vinyl, propenyl (e.g., allyl group), butenyl, methylpropenyl, pentenyl and hexenyl.
• a lower alkenyl group such as vinyl, propenyl (e.g., allyl group), butenyl, methylpropenyl, pentenyl and hexenyl.
• aryl groups include phenyl, tolyl, xylyl, cumenyl, mesityl and naphthyl.
• Preferable protective groups in the "protected hydroxy groups" and the protected amino are 1-(lower alkylthio)-(lower)alkyl group such as a lower alkylthiomethyl group (e.g., methylthiomethyl, ethylthiomethyl, propylthiomethyl, isopropylthiomethyl, butylthiomethyl, isobutylthiomethyl, hexylthiomethyl, etc.), more preferably C 1 -C 4 alkylthiomethyl group, most preferably methylthiomethyl group; trisubstituted silyl group such as a tri(lower)alkylsilyl (e.g., trimethylsilyl, triethylsilyl, tributylsilyl, tert-butyldimethylsilyl, tri-tert-butylsilyl, etc.) or lower alkyl-diarylsilyl (e.g., methyldiphenylsily
• aliphatic acyl groups include a lower alkanoyl group optionally having one or more suitable substituents such as carboxy, e.g., formyl, acetyl, propionyl, butyryl, isobutyryl, valeryl, isovaleryl, pivaloyl, hexanoyl, carboxyacetyl, carboxypropionyl, carboxybutyryl, carboxyhexanoyl, etc.; a cyclo(lower)alkoxy(lower)alkanoyl group optionally having one or more suitable substituents such as lower alkyl, e.g., cyclopropyloxyacetyl, cyclobutyloxypropionyl, cycloheptyloxybutyryl, menthyloxyacetyl, menthyloxypropionyl, menthyloxybutyryl, menthyloxypentanoyl, menthyloxyhexanoyl
• aromatic acyl groups include an aroyl group optionally having one or more suitable substituents such as nitro, e.g., benzoyl, toluoyl, xyloyl, naphthoyl, nitrobenzoyl, dinitrobenzoyl, nitronaphthoyl, etc.; and an arenesulfonyl group optionally having one or more suitable substituents such as halogen, e.g., benzenesulfonyl, toluenesulfonyl, xylenesulfonyl, naphthalenesulfonyl, fluorobenzenesulfonyl, chlorobenzenesulfonyl, bromobenzenesulfonyl, iodobenzenesulfonyl, etc.
• suitable substituents such as nitro, e.g., benzoyl, toluoyl, xy
• Examples of the aliphatic acyl groups substituted by an aromatic group include ar(lower)alkanoyl group optionally having one or more suitable substituents such as lower alkoxy or trihalo(lower)alkyl, e.g., phenylacetyl, phenylpropionyl, phenylbutyryl, 2-trifluoromethyl-2-methoxy-2-phenylacetyl, 2-ethyl-2-trifluoromethyl-2-phenylacetyl, 2-trifluoromethyl-2-propoxy-2-phenylacetyl, etc.
• suitable substituents such as lower alkoxy or trihalo(lower)alkyl, e.g., phenylacetyl, phenylpropionyl, phenylbutyryl, 2-trifluoromethyl-2-methoxy-2-phenylacetyl, 2-ethyl-2-trifluoromethyl-2-phenylacetyl, 2-trifluoromethyl-2-
• acyl groups among the aforesaid acyl groups are C 1 -C 4 alkanoyl group optionally having carboxy, cyclo(C 5 -C 6 )alkoxy(C 1 -C 4 )alkanoyl group having two (C 1 -C 4 ) alkyls at the cycloalkyl moiety, camphorsulfonyl group, carboxy-(C 1 -C 4 )alkylcarbamoyl group, tri(C 1 -C 4 ) alkylsilyl(C 1 -C 4 )-alkoxycarbonyl (C 1 -C 4 )-alkylcarbamoyl group, benzoyl group optionally having one or two nitro groups, benzenesulfonyl group having halogen, or phenyl(C 1 -C 4 )alkanoyl group having C 1 -C 4 alkoxy and trihalo(C 1 -C 4 )al
• the most preferable ones are acetyl, carboxypropionyl, menthyloxyacetyl, camphorsulfonyl, benzoyl, nitrobenzoyl, dinitrobenzoyl, iodobenzenesulfonyl and 2-trifluoromethyl-2-methoxy-2-phenylacetyl.
• Preferable examples of the "5- or 6-membered nitrogen, sulfur and/or oxygen containing heterocyclic ring" include a pyrrolyl group and a tetrahydrofuryl group.
• a heteroaryl which may be substituted by suitable substituents moiety of the "heteroaryloxy which may be substituted by suitable substituents” may be the ones exemplified for R 1 of the compound of the formula of EP-A-532,088, with preference given to 1-hydroxyethylindol -5-yl, the disclosure of which is incorporated herein by reference.
• the tricyclic compounds (I) and its pharmaceutically acceptable salt for use in accordance with this invention are well known to have excellent immunosuppressive activity, antimicrobial activity and other pharmacological activities and, as such, be of value for the treatment or prevention of rejection reactions by transplantation of organs or tissues, graft-vs-host diseases, autoimmune diseases, and infectious diseases [EP-A-0184162, EP-A-0323042, EP-A-423714, EP-A-427680, EP-A-465426, EP-A-480623, EP-A-532088, EP-A-532089, EP-A-569337, EP-A-626385, WO89/05303, WO93/05058, WO96/31514, WO91/13889, WO91/19495, WO93/5059, etc.].
• the FK506 (general name: tacrolimus) of the following chemical formula, in particular, is a representative compound.
• tricyclic compounds (I) are the ones, wherein each of adjacent pairs of R 3 and R 4 or R 5 and R 6 independently form another bond formed between the carbon atoms to which they are attached;
• tricyclic compounds(I) is, in addition to FK506, ascomycin derivatives such as halogenated-ascomycin (e.g., 33-epi-chloro-33-desoxyascomycin), which is disclosed in EP 427,680, example 66a.
• ascomycin derivatives such as halogenated-ascomycin (e.g., 33-epi-chloro-33-desoxyascomycin), which is disclosed in EP 427,680, example 66a.
• rapamycin [THE MERCK INDEX (12th edition), No. 8288] and its derivatives can be exemplified.
• Preferred example of the derivatives is an O-substituted derivative in which the hydroxy in position 40 of formula A illustrated at page 1 of WO 95/16691, incorporated herein by reference, is replaced by OR 1 in which R 1 is hydroxyalkyl, hydroalkoxyalkyl, acylaminoalkyl and aminoalkyl; for example 40-O-(2-hydroxy)ethyl-rapamycin, 40-O-(3-hydroxy)propyl-rapamycin, 40-O-[2-(2-hydroxy)ethoxy]ethyl-rapamycin and 40-O-(2-acetaminoethyl)-rapamycin.
• O-substituted derivatives may be produced by reacting rapamycin (or dihydro or deoxo-rapamycin) with an organic radical attached to a leaving group (for example RX where R is the organic radical which is desired as the O-substituent, such as an alkyl, allyl, or benzyl moiety, and X is a leaving group such as CCl 3 C(NH)O or CF 3 SO 3 ) under suitable reaction conditions.
• a leaving group for example RX where R is the organic radical which is desired as the O-substituent, such as an alkyl, allyl, or benzyl moiety, and X is a leaving group such as CCl 3 C(NH)O or CF 3 SO 3
• the conditions may be acidic or neutral conditions, for example in the presence of an acid like trifluoromethanesulfonic acid, camphorsulfonic acid, p-toluenesulfonic acid or their respective pyridinium or substituted pyridinium salts when X is CCl 3 C(NH)O or in the presence of a base like pyridine, a substituted pyridine, diisopropylethylamine or pentamethylpiperidine when X is CF 3 SO 3 .
• the most preferable one is 40-O-(2-hydroxy)ethyl rapamycin, which is disclosed in WO94/09010, the disclosure of which is incorporated herein by reference.
• the tricyclic compounds(I), and rapamycin and its derivatives have a similar basic structure, i.e., tricyclic macrolide structure, and at least one of the similar biological properties (for example, immunosupressive activity).
• the tricyclic compounds(I), and rapamycin and its derivatives may be in a form of its salt, which includes conventional non-toxic and pharmaceutically acceptable salt such as the salt with inorganic or organic bases, specifically, an alkali metal salt such as sodium salt and potassium salt, an alkali earth metal salt such as calcium salt and magnesium salt, an ammonium salt and an amine salt such as triethylamine salt and N-benzyl-N-methylamine salt.
• an alkali metal salt such as sodium salt and potassium salt
• an alkali earth metal salt such as calcium salt and magnesium salt
• an ammonium salt and an amine salt such as triethylamine salt and N-benzyl-N-methylamine salt.
• the macrolide compound used in the present invention there may be conformers and one or more stereoisomers such as optical and geometrical isomers due to asymmetric carbon atom(s) or double bond(s), and such conformers and isomers are also included within the scope of macrolide compound in the present invention.
• the macrolide compounds can be in the form of a solvate, which is included within the scope of the present invention.
• the solvate preferably include a hydrate and an ethanolate.
• One of preferable specific examples of the sustained-release formulation in accordance with the present invention is a formulation comprising a solid dispersion composition, wherein a macrolide compound is present as an amorphous state in a solid base, which shows its T63.2 is 0.7 to 15 hours.
• the presence or absence of a diffraction peak detected by X-ray crystallography, thermal analyses, and so on indicates whether or not a macrolide compound is present as an amorphous state in a solid base in the solid dispersion composition.
• the solid base is a pharmaceutically acceptable water-soluble base; and more preferably, the base is for example one of the following water-soluble polymers:
• the water-soluble polymers are individually used singly or in a mixture of two or more thereof.
• a more preferable water-soluble base is cellulose polymer or PVP; and the most preferable water-soluble base is HPMC, PVP or a combination thereof.
• HPMC of a type with a low viscosity can exert a more desirable sustained-release effect, when used;
• an aqueous 2% solution of the type of HPMC is at a viscosity of 1 to 4,000 cps, preferably 1 to 50 cps, more preferably 1 to 15 cps, as measured at 20 °C by a viscometer of Brookfield type; in particular, HPMC 2910 at a viscosity of 3 cps (TC-5E, EW, Shin-estu Chemical Co., Ltd.) is preferable.
• the weight ratio of the macrolide compound and such water-soluble base is preferably 1 : 0.05 to 1 : 2, more preferably 1 : 0.1 to 1 : 1, most preferably 1 : 0.2 to 1 : 0.4.
• the solid base is additionally exemplified by water-insoluble pharmaceutically acceptable bases capable of retaining the macrolide compound as an amorphous state and being at the solid state at ambient temperature. More specifically, the solid base includes for example wax and water-insoluble polymers.
• wax examples include glycerin monostearate and sucrose fatty acid esters [for example, mono-, di- or triesters of sucrose with moderate to higher fatty acids, with 8 to 20 carbon atoms, for example caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachic acid, behenic acid, oleic acid, linoleic acid, etc.).
• additional examples of wax include polyglycerin fatty acid ester. Any polyglycerin fatty acid ester including monoester, diester or polyester of polyglycerin with fatty acid is satisfactory.
• polyglycerin fatty acid ester examples include for example behenate hexa(tetra)glyceride, caprylate mono(deca)glyceride, caprylate di(tri)glyceride, caprate di(tri)glyceride, laurate mono(tetra)glyceride, laurate mono(hexa)glyceride, laurate mono(deca)glyceride, oleate mono(tetra)glyceride, oleate mono(hexa)glyceride, oleate mono(deca)glyceride, oleate di(tri)glyceride, oleate di(tetra)glyceride, oleate sesqui(deca)glyceride, oleate penta(tetra)glyceride, oleate penta(hexa)glyceride, oleate deca(deca)glyceride, linoleate mono(h
• Preferable polyglycerin fatty acid esters are for example behenate hexa(tetra)glyceride [for example, Poem J-46B under a trade name, manufactured by Riken Vitamin Co., Ltd.], stearate penta(tetra)glyceride [for example, PS-310 under a trade name, manufactured by Sakamoto Yakuhin Kogyo Co., Ltd.], stearate mono(tetra)glyceride [for example, MS-310 under a trade name, manufactured by Sakamoto Yakuhin Kogyo Co., Ltd.], stearate penta(hexa)glyceride [PS-500 under a trade name, manufactured by Sakamoto Yakuhin Kogyo Co., Ltd.], stearate sesqui(hexa)glyceride [SS-500 under a trade name, manufactured by Sakamoto Yakuhin Kogyo Co., Ltd.], stearate mono(deca)glyceride and
• More preferable waxes are glycerin monostearate and low-HLB sucrose fatty acid ester [for example, F-50, F-20, F-10, etc., manufactured by Dai-ichi Kogyo Seiyaku, Co., Ltd.].
• the weight ratio of the macrolide compound and wax is preferably 1 : 10 to 1 : 100, more preferably 1 : 40 to 1 : 60, when the wax is for example glycerin monostearate; the weight ratio thereof is preferably 1 : 0.2 to 1 : 20, more preferably 1 : 0.5 to 1 : 5, when the wax is for example sucrose fatty acid ester; the weight ratio thereof is preferably 1 : 0.1 to 1 : 100, more preferably 1 : 0.5 to 1 : 50, when the wax is polyglycerin fatty acid ester.
• Preferable water-insoluble polymers include for example ethylcellulose, methacrylate copolymers (for example, Eudragits such as Eudragit E, R, S, RS, LD, etc.).
• ethylcellulose a pharmaceutically acceptable one can be used in the present invention.
• its preferable viscosity is 3 to 110 cps, more preferably 6 to 49 cps, most preferably 9 to 11 cps, when the viscosity of 5% ethylcellulose-toluene/ethanol (80/20) solution is measured by a viscosity test described in USP 23, NF18.
• the preferable one is ETHOCELL (viscosity: 10) (trademark, Dow Chemical(US)).
• the weight ratio of the macrolide compound and the water-insoluble polymer is preferably 1 : 0.01 to 1 : 10, more preferably 1 : 0.1 to 1 : 5; most preferably 1 : 0.1 to 1 : 1, when the water-insoluble polymer is ethylcellulose; the weight ratio thereof is most preferably 1 : 0.5 to 1 : 5, when the water-insoluble polymer is a methacrylate copolymer.
• the above solid base such as water-soluble base and water-insoluble base
• the above solid base may be usable by singly or in combination thereof.
• suitable dissolution profile of the solid dispersion composition can be achieved by mixing a suitable amount of water-soluble base, such as water-soluble polymer (e.g., HPMC).
• suitable excipients lactose, etc.
• binders coloring agents
• sweeteners for example, sweeteners, flavor, diluents, antioxidants (vitamin E, etc.) and lubricants (for example, synthetic aluminium silicate, magnesium stearate, calcium hydrogen phosphate, calcium stearate, talc, etc.) for common use, are added to prepare a solid dispersion composition.
• lubricants for example, synthetic aluminium silicate, magnesium stearate, calcium hydrogen phosphate, calcium stearate, talc, etc.
• the dissolution rate of the macrolide compound from the solid dispersion composition is sometimes too slow or the initial dissolution rate thereof is sometimes required to be elevated.
• the dissolution rate of the macrolide compound from the solid dispersion composition can be adjusted, by adding appropriate disintegrators [for example, cross carmelose sodium (CC-Na), carboxymethyl cellulose calcium (CM-Ca), lowly substituted hydroxypropyl cellulose (L-HPC), starch sodium glycolate, micro-fine crystal cellulose, cross povidone, etc.] or appropriate surfactants [for example, hardened polyoxyethylene castor oil, polyoxyl stearate 40, polysorbate 80, sodium lauryl sulfate, sucrose fatty acid ester (HLB is more than 10), etc] to the solid dispersion composition.
• the solid dispersion composition preferably does not substantially contain any disintegrator when preparing the sustained-release formulation of the present invention.
• the particle size of the solid dispersion composition where the macrolide compound is present as an amorphous state in the solid base is preferably equal to or smaller than 500 ⁇ m. More preferably, the composition is of a particle size passing through a 350- ⁇ m , most preferably 250- ⁇ m sieve.
• solid dispersion composition of a macrolide compound comprised in the sustained-release formulation in accordance with the invention can be produced by methods described in EP 0 240 773 and WO 91/19495 and the like; the methods are more specifically described below.
• the macrolide compound is dissolved in an organic solvent (for example, ethanol, dichloromethane or an aqueous mixture thereof, etc.), followed by addition of an appropriate amount of a solid base, and the resulting mixture is sufficiently dissolved or suspended together or is allowed to swell. Then, the mixture is sufficiently kneaded together. After removing the organic solvent from the mixture, the residue is dried and ground and is then subjected to size reduction, whereby a solid dispersion composition can be prepared, where the macrolide compound is present as an amorphous state in the solid base.
• lubricants such as calcium hydrogen phosphate, excipients such as lactose, and the like can further be added to the mixture, if necessary.
• the sustained-release formulation comprising a macrolide compound in accordance with this invention can also be manufactured by using a finely divided powder of the macrolide compound.
• the particle size control of the macrolide compound can be effected by means of milling machinery which is of routine use in pharmaceutical industry, such as a pin mill, hammer mill, jet mill, and dry or wet ball-mill, to name but a few examples.
• the macrolide compound fine powder should have a particle diameter distribution within the range of 0.1 ⁇ 50 ⁇ m, preferably 0.2 ⁇ 20 ⁇ m, and more preferably 0.5 ⁇ 10 ⁇ m, and/or a mean particle diameter of 0.2 ⁇ 20 ⁇ m, preferably 0.5 ⁇ 10 ⁇ m, and more preferably 1 ⁇ 5 ⁇ m.
• the dispersion solid composition and the fine powder of the macrolide compound, thus produced by the above methods can be used as such as a sustained-release formulation.
• the composition is more preferably prepared as a sustained-release formulation in a form of powder, fine powder, granule, tablet or capsule by routine formulation methods (e.g., compression molding).
• the sustained-release formulation can be prepared by mixing the solid dispersion composition or fine powder of macrolide compounds, with, for example, diluents or lubricants (such as sucrose, lactose, starch, crystal cellulose, synthetic aluminium silicate, magnesium stearate, calcium stearate, calcium hydrogen phosphate, and talc) and/or coloring agents, sweeteners, flavor and disintegrators for routine use.
• diluents or lubricants such as sucrose, lactose, starch, crystal cellulose, synthetic aluminium silicate, magnesium stearate, calcium stearate, calcium hydrogen phosphate, and talc
• coloring agents such as sucrose, lactose, starch, crystal cellulose, synthetic aluminium silicate, magnesium stearate, calcium stearate, calcium hydrogen phosphate, and talc
• the sustained-release formulation, or the solid dispersion composition or fine powder of macrolide compound of the present invention can be preliminarily dispersed in water and
• the effective dose of the macrolide compound varies, depending on the type of the compound, the age of a patient, his (her) disease, the severity thereof, or other factors.
• the effective ingredient is used at a dose of about 0.001 to 1,000 mg, preferably 0.01 to 500 mg, more preferably 0.1 to 100 mg per day for the therapeutic treatment of the disease; generally, a mean single dose is about 0.01 mg, 0.1 mg, 0.5 mg, 1 mg, 5 mg, 10 mg, 50 mg, 100 mg, 250 mg, and 500 mg.
• the sustained-release formulation of the macrolide compound in accordance with the invention characteristically releases the macrolide compound in a sustained manner and the pharmaceutical activity maintains for a long period.
• the frequency of administration of pharmacologically active macrolide compounds can be decreased. More particularly, it has become possible to provide a macrolide-containing pharmaceutical formulation which may be administered only once a day. Furthermore, it is by now possible to provide a pharmaceutical composition which is free from the risk for undisired effects caused by a transiently excessive concentration and insures an expression of pharmacological efficacy over a sufficiently extended period of time.
• the sustained-release formulation of the present invention is useful for treatment and/or prevention of the following diseases and conditions because of the pharmacological activities possessed by the said macrolide compounds, particularly by the tricyclic compounds (I).
• the said tricyclic macrolides have liver regenerating activity and/or activities of stimulating hypertrophy and hyperplasia of hepatocytes. Therefore, the pharmaceutical composition of the present invention is useful for increasing the effect of the therapy and/or prophylaxis of liver diseases [e.g. immunogenic diseases (e.g. chronic autoimmune liver diseases such as autoimmune hepatic diseases, primary biliary cirrhosis or sclerosing cholangitis), partial liver resection, acute liver necrosis (e.g.
• immunogenic diseases e.g. chronic autoimmune liver diseases such as autoimmune hepatic diseases, primary biliary cirrhosis or sclerosing cholangitis
• partial liver resection e.g.
• necrosis caused by toxins, viral hepatitis, shock, or anoxia), hepatitis B, non-A non-B hepatitis, hepatocirrhosis, and hepatic failure e.g. fulminant hepatitis, late-onset hepatitis and "acute-on-chronic" liver failure (acute liver failure on chronic liver diseases)].
• the present composition is also useful for increasing the effect of the prevention and/or treatment of various diseases because of the useful pharmacological activity of the said tricyclic macrolides, such as augmenting activity of chemotherapeutic effect, activity of cytomegalovirus infection, anti-inflammatory activity, inhibiting activity against peptidyl-prolyl isomerase or rotamase, antimalarial activity, antitumor activity, and so on.
• useful pharmacological activity of the said tricyclic macrolides such as augmenting activity of chemotherapeutic effect, activity of cytomegalovirus infection, anti-inflammatory activity, inhibiting activity against peptidyl-prolyl isomerase or rotamase, antimalarial activity, antitumor activity, and so on.
• This invention further provides a dissolution test method for a solid formulation comprising macrolide compound, which uses a test solution Containing a suitable amount of cellulose polymer.
• the dissolution test for testing a release characteristic of a medicinally active ingredient dissolved from a solid formulation containing it is carried out in accordance with Dissolution Test, Method 2 (Paddle method, 50 rpm), JP XIII, or Dissolution Test shown in USP 23, NF18 or in European Pharmacopoeia (3rd edition).
• Dissolution Test Method 2 (Paddle method, 50 rpm), JP XIII, or Dissolution Test shown in USP 23, NF18 or in European Pharmacopoeia (3rd edition).
• the release of the macrolide compound based on the intrinsic content thereof may not reach 100% even after several hours.
• the present inventors found that by adding a suitable amount of cellulose polymer (such as, HPMC, hydroxypropylcellulose phthalate, MC, CMC-Na, hydroxyethyl cellulose, hydroxypropyl cellulose(HPC), and so on) to the test solution and by, if necessary, adding phosphoric acid or the like to the test solution so as to bring its pH to not higher than 7 in order to avoid the adverse effect of the consequent increase in pH on the stability of the macrolide compound, the influence of adsorption of the macrolide compound on surfaces of the test apparatus can be inhibited to achieve a recovery rate of substantially 100%.
• cellulose polymer such as, HPMC, hydroxypropylcellulose phthalate, MC, CMC-Na, hydroxyethyl cellulose, hydroxypropyl cellulose(HPC), and so on
• Preferable cellulose polymer is hydroxypropyl cellulose or its equivalent, the preferable viscosity Of which is such that when its 5.0 g is dissolved in 95 ml of water, and after centrifugation to remove the foam where necessary, the viscosity of the solution is measured with a rotary viscometer at 25 ⁇ 0.1°C, the solution shows a viscosity of 75 ⁇ 150 cps.
• the hydroxypropyl cellulose with an average molecular weight of about 100,000 as available from Aldrich corresponds thereto.
• the "suitable amount" of cellulose polymer to be added to the test solution is 0.001 ⁇ 0.1%, preferably 0.002 ⁇ 0.01%, and most preferably 0.005%, all based on the total amount of the test solution.
• Dissolution Test Method 2 (Paddle method), JP XIII, and dissolution test shown in USP 23, NF18 or in European Pharmacopoeia (3rd edition) are well-known methods for testing the release kinetics of the active ingredient from a solid pharmaceutical product. They are dissolution tests using the specified vessel, paddle and other hardware, with controlling quantity of test solution, temperature of test solution, rotational speed, and other conditions. Where necessary, the test is performed with the test solution adjusted to a suitable pH. In the present invention, pH is preferably not higher than 7.
• FK506 is admixed as its monohydrate when preparing compositions containing it, though its amount is expressed as the weight of FK506, not of its monohydrate.
• the SDC 1-2 which was obtained in Example 1, was sufficiently mixed with lactose (58.0 mg), and the resulting mixture was encapsulated, to prepare a capsule.
• Example 2 In a similar manner to that of Example 1, a ground powder of the following SDC of particle sizes of 180 to 250 ⁇ m was prepared.
• SDC Macrolide compound Water-soluble base 3-1) FK506 (1.0 mg) HPMC 2910 (0.3 mg) 3-2) FK506 (1.0 mg) HPMC 2910 (0.1 mg)
• the SDC 3-1) was sufficiently mixed with lactose (58.7 mg), and the resulting mixture was encapsulated, to prepare capsule 3-1).
• the SDC 3-2) was sufficiently mixed with lactose (58.9 mg), and the resulting mixture was encapsulated to prepare capsule 3-2).
• SDC Macrolide compound Water-soluble base 4-1) (2.0 mg in total) FK506 (1.0 mg) MC (1.0 mg) 4-2) (2.0 mg in total) FK506 (1.0 mg) PVP (1.0 mg) 4-3) (2.0 mg in total) FK506 (1.0 mg) HPMC 2910 (1.0 mg) 4-4) (2.0 mg in total) FK506 (1.0 mg) HPC (1.0 mg) 4-5) (2.0 mg in total) FK506 (1.0 mg) PEG (1.0 mg) 4-6) (2.0 mg in total) FK506 (1.0 mg) HPMC 2910 (0.8mg) PVP (0.2 mg)
• lactose (at an appropriate amount) and magnesium stearate (0.6 mg) were added to the respective SDCs to prepare respective capsules, each of 60.0 mg in total.
• a SDC was prepared by using FK506 (1.0 mg) and HPMC 2910 (1.0 mg).
• the following additives were respectively added to the SDC to prepare capsules 5-1) to 5-4), each of 60.0 mg in total.
• Capsule No. Additive(s) 5-1) crystal cellulose (appropriate amount) magnesium stearate (0.6 mg) 5-2) calcium hydrogen phosphate (appropriate amount) magnesium stearate (0.6 mg) 5-3) lactose (appropriate amount) L-HPC (3.0 mg) magnesium stearate (0.6 mg) 5-4) corn starch (appropriate amount) calcium stearate (0.6 mg)
• FK506 was dissolved in ethanol, and to the resulting solution was added HPMC 2910 to allow to sufficiently swell. Subsequently, the mixture was kneaded together. The resulting kneaded substance was transferred onto a stainless tray, dried in vacuo, and ground with a coffee mill. Subsequently, the resulting powder was subjected to size reduction by the following processes, to prepare SDCs 6-1) to 6-6).
• Example 6 The SDC 6-4) (1.3 mg) which was obtained in Example 6 was mixed thoroughly with lactose (58.1 mg) and magnesium stearate (0.6 mg), and the resulting mixture was filled in capsules, which was defined as capsule 7.
• SDCs Macrolide compound Water-soluble base 8-1) ascomycin (1.0 mg) HPMC 2910 (0.3 mg) 8-2) 33-epi-chloro-33-desoxyascomycin (1.0 mg) HPMC 2910 (0.3 mg) 8-3) 40-O-(2-hydroxy)-ethyl-rapamycin (1.0 mg) HPMC 2910 (0.3 mg)
• each capsule is prepared by adding lactose(58.1mg) and magnesium stearate(0.6mg).
• FK506 was dissolved in ethanol, and HPMC 2910 is added to and mixed sufficiently with the resulting solution, followed by further addition of calcium hydrogen phosphate. After drying in vacuo overnight, the resulting mixture was subjected to size reduction by using a speed mill and a roll granulator; the resulting powder was sieved with a sieve of 212 ⁇ m; a fraction of those passing through the sieve is designated as SDC 9.
• SDC 9 lactose and magnesium stearate were mixed together, to prepare Formulation 9.
• the Formulation 9 was filled at 350 mg in No. 1 capsule and at 70 mg in No. 5 gelatin capsule, which were defined as Formulations A and B, respectively.
• FK506 was dissolved in ethanol, and HPMC 2910 was added to and mixed sufficiently with the resulting solution, followed by further addition of calcium hydrogen phosphate. After the resulting mixture was dried in vacuo overnight, the mixture was subjected to size reduction by using a speed mill and a roll granulator; the resulting powder was sieved with a sieve of 250 ⁇ m and a sieve of 180 ⁇ m; a fraction of 180 - 250 ⁇ m is defined as SDC 11. The SDC 11, lactose and magnesium stearate were mixed together, to prepare Formulation 11. The Formulation 11 was filled at 350 mg in No. 1 capsule and at 70 mg in No. 5 gelatin capsule, which were defined as Formulations C and D, respectively.
• Glycerin monostearate was heated and melt at 80°C, to which was added FK506 under agitation to dissolve FK506 therein.
• HPMC 2910 for sufficient mixing, and the resulting mixture was then transferred to a tray to stand alone for spontaneous cooling.
• the solid substance obtained by cooling was ground with a coffee mill and was then sieved with a sieve of 500 ⁇ m. A fraction of those passing through the sieve was defined as SDC 12.
• the SDC 12 was mixed with magnesium stearate, to prepare Formulation 12, which is then filled at 60.6 mg in No. 5 capsule.
• the resulting capsule is defined as Formulation E.
• FK506 was dissolved in ethanol, and ethylcellulose was added to and was solved. And HPMC 2910 and lactose were mixed sufficiently with the resulting solution. After drying in vacuo overnight, the resulting mixture was subjected to size reduction by using a power mill and a roll granulator; the resulting powder was sieved with a sieve of 250 ⁇ m; a fraction of those passing through the sieve is designated as SDC 20. The SDC 20, lactose and magnesium stearate were mixed together, to prepare Formulation 20. The Formulation 20 was filled at 350 mg in No. 1 capsule and at 70 mg in No. 5 gelatin capsule, which were defined as Formulations M and N, respectively.
• Example 21 a fraction of those passing through the sieve 212 ⁇ m was designated as SDC 21 and Formulation 21 were prepared. And then Formulation 21 was filled at 350 mg in No. 1 gelatin capsule and at 70 mg in No. 5 gelatin capsule to be prepared as Formulation O and P, respectively.
• Ethanol was added to tetraglycerine trifatty acid ester.
• the resulting mixture was melted by heating at 40 °C and FK506 was added and melted with mixing. Lactose was added thereto, mixed and then cooled spontaneously in a tray .
• the resulting solid substance was ground by a coffee mill, dried in vacuo overnight and graded by using sieves of 150 ⁇ m and 106 ⁇ m, to prepare a fraction of 106 - 150 ⁇ m as SDC 29.
• the SDC 29 was mixed with lactose and prepared as Formulation 29, and then Formulation 29 was filled at 70 mg in No. 5 gelatin capsule to be prepared as Formulation X.
• Formulation 30 FK506 fine powder 0.5 g Lactose 29.2 g Magnesium stearate 0.3 g total 30 g
• FK506 crystal was ground by a jet mill and was mixed with lactose and magnesium stearate to prepare Formulation 30. Then Formulation 30 was filled at 60 mg in No. 5 gelatin capsule to be prepared as Formulation Z.
• the range of particle size of FK506 fine powder ground by a jet mill was 1-10 ⁇ m and its mean particle size was about 3 ⁇ m.
• test samples were orally given to 6 cynomologus monkeys (at 1 mg/monkey as an FK506 dose), to assay the blood FK506 concentration after administration. Seventeen hours prior to the administration, feeds were withdrawn from a feed table for cynomologus monkeys of body weights around 6 kg. Then, the animals were starved until 12 hours passed after the administration. Water was fed ad libitum prior to the initiation of the test throughout the administration of the test samples and thereafter. At the dosing, water (20 ml) was simultaneously given to the animals.
• the maximum blood concentration (Cmax) is defined as the maximum value of the whole blood drug.
• Tmax is the time required for reaching the maximum blood concentration.
• MRT is defined as the mean retention time.
• AUC area under the blood concentration-time curve
• the small variation in individuals of the maximum blood concentration or area under the blood concentration time curve of the macrolide compound after oral dosing, compared with a rapid release formulation thereof can be determined, by using an indicator of the variation of the blood absorbability of the macrolide compound, namely standard deviation/mean (CV in %) of the maximum blood concentration or the area under the blood concentration time curve.
• an indicator of the variation of the blood absorbability of the macrolide compound namely standard deviation/mean (CV in %) of the maximum blood concentration or the area under the blood concentration time curve.
• standard deviation/mean CV in %

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